Safety attachment for gas-burners



(No Model.)

J. S. VALENTINE. SAFETY ATTACHMENT FOR GAS BURNERS.

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UNITED STATES ATENT EEIc JULIUS s. VALENTINE, OF LANSING, MICHIGAN.

SAFETY ATTACHMENT FOR GAS-'BURNERS.

SPECIFICATION forming part of Letters Patent No. 451,785, dated May 5, 1891.

Application filed December 11, 1890- Serial No, 374,334. (No model.)

toletters of reference marked thereon, which form a part of this specification.

' This invention relates to improvements in safety attachments for gas-burners.

The object of the invention is to provide a gas-burner and stop-cock with means whereby when the gas becomes accidentally extinguished or blown out the cock will be oper-' ated automatically to turn off the flow of gas, and thereby prevent accidents or loss of life from asphyxiation; and it consists in the construction and combination of the parts, as will be herein after fully set forth, and particularly pointed out in the claims, whereby a springactuatedstop-cock is released by the action of a thermostatic bar.

In the accompanying drawings, forming part of this specification, Figure 1 is a side elevation of an automatic or self-closing gasburner constructed in accordance with and embodying my invention, the cock being shown open in full lines and closed in dotted lines. Fig. 2 is a front view, and Fig. 3 a plan view.

A refers to the burner, and B to the coupling or section of pipe carrying the stop-cock of ordinary construction. The stem of the key or stop-cock is encircled by aspringb, one end of which is secured to the section B and the other to the knob or handle B, so that the spring will have a tendency to normally throw and hold the cock closed. From the knob or handle 13' extends an arm 0 of spring metal, the upper end of which is bent to engage the teeth of the pivoted ratchet-plate D. From the arm 0 depends a member 0', the lower end of which is bent at right angles to lie slightly above the knob or handle B, and by pressing upon this member it will release the spring-arm G from the ratchet-plate wheitoperating the cock by hand.

Attached to the burner A is a frame E, having extended arms 6 and e, to one of which 8 is rigidly secured a thermostatic bar F, the opposite end of said barbeing attached to the upper end of a lever G, pivoted near the upper end of the arm 6, and at its lower end this lever carries a gravity catch or arm H, which passes through a suitable guide or loop h, and at its outer end is notched for engagement with the upturned edge of the pivoted ratchet-plate. At the rear of the notch 1', hereinbefore referred to, is a notch t", and between these notches the under side of the arm H is rounded to ride upon the loop 7t and release the pivoted ratchet-plate after its being retracted a sufficient distance, said ratchet-plate being spring-actuated in one direction by means of the fiat spring (1'.

The plate I forms a part of the frame E and is curved in a segment of a circle, as shown,

the ratchet-plate D, carried thereby, being correspondingly curved. Forward movement of the ratchet-plate D is limited by the pin m, and the end of this plate is provided with a projecting portion which serves the double purpose of preventing excessive turning of the arm 0 and of affording a means for manually operating the ratchet-plate to release said arm to allow-the spring to act upon the cock to turn off the flow of gas.

\Vhen it is desired to light the gas, the key or cook can be turned, when the arm 0 will travel over the ratchet-plate and engage one of the teeth thereof. The gas being lit will expand the thermostatic bar F, and said expansionwill move the arm H over the upturned portion of the pivoted ratchet-plate, so that its notched end will engage therewith. Now should the gas be accidentally extinguished the thermostatic bar will contract, and through the medium of the lever Goperate the arm II to draw the ratchet-plate out of engagement. with the arm 0, and thus permit the spring to act to close the stop-cock. Should it be desired to turn off the gas at any time by grasping the knob B and pressing upon the member 0 of the spring-arm O the said arm will be thrown to one side and heldout of engagement with the ratchet-plate while the-cock is being turned. The same result may also be accomplished by simply bearing upon the end of the ratchet-plate, when the spring will do the rest.

Having thus described my invention, what I claim as new, and desire to secure byLetters Patent, is-

1. In a safety gas-burner, the combination of a spring-operated turning-cook provided with a spring-arm, a pivoted ratchet-plate located in the path of said spring-arm, and a thermostatic bar connected at one end to a lever, the opposite end of said lever being provided with a notched arm which engages with a pivoted ratchet-plate, the arm carried by the stop-cock also engaging with the ratchet-plate, substantially as shown, and for the purpose set forth.

2. In a safety gas-burner, the combination of a frame attached to the burner, said frame being provided with upwardly-projecting arms, a thermostatic bar rigidly secured to one of said arms and to a lever pivoted on the opposite arm, a catch-arm secured to the lower end of the lever, a ratchet-plate having an upturned portion with which the catch-arm engages, and a spring-actuated cock carrying an arm the upper end of which is adapted to engage the ratchet-plate, substantially as set forth.

3. In combination with a thermostatic or safety gas-burner, a pivoted ratchet-plate and a stop-cock spring-actuated in one direction and provided with an arm for engagement with the ratchet-plate, said arm having a member the lower end of which is bent to lie over the knob or handle of the stop-cock, substantially as set forth.

4. The combination,in asafety gas-burner, of a frame carrying a thermostatic bar, lever, and catch-arm, a plate carrying a pivoted ratchet-bar and spring for throwing said ratchet-bar, together with a stop for limiting its outward movement, and a stop-cock provided with a spring-arm for engaging said ratchet-bar, substantially as set forth.

5. The combination, in a safety gas-burner, of a frame having upwardly-projecting portions, a thermostatic bar rigidly secured to one of said portions and to a lever carried by the opposite portion, a catch-arm pivoted to the lever and provided with a rounded portion adapted to ride upon a lug or loop carried by the frame, a spring-actuated ratchetplate having an upturned portion with which the catch-bar engages, a stop for limiting the outward movement of the same, and an end projecting portion serving as a stop against which a spring-arm carried by the stop-cock will abut to limit the movement thereof, the parts being organized substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JULIUS S. VALENTINE.

Witnesses:

W. DONOVAN, J. H. WARDWELL. 

